Synthesis of (E)-diethyl 6,6′-(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates), a new type of 2,2′-azopyridine dyes
摘要:
An unexpected, but simple method for the efficient synthesis of new 2.2'-azopyridine dyes, such as (E)-diethyl 6,6'-(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates) (2, 4, 6, 8, 10, and 12), based on the treatment of ethyl 6-amino-5-cyano-2-methyl-4-arylnicotinates (1, 3, 5, 7, 9, and 11) with NBS/benzoyl peroxide, is described. The X-ray diffraction analysis and the UV-vis absorption spectra of dye 2 are reported and discussed. (C) 2010 Elsevier Ltd. All rights reserved.
摘要 通过柳氮磺吡啶铁与作为磁性生物聚合物表面的纳米材料CoFe 2 O 4 -纤维素反应,制备了绿色纳米催化剂。这种新型非均相有机金属催化剂通过 X 射线衍射、场发射扫描电子显微镜、FT-IR 光谱、热重分析和 X 射线能量色散分析以及电感耦合等离子体质谱法进行了表征。这种负载在 CoFe 2 O 4 纤维素上的绿色柳氮磺吡啶药物复合物被用作有机反应的有效且可回收的催化剂,例如功能化 4H-吡喃和 1,4-二氢吡啶衍生物的合成。所有的反应都在温和的条件下在很短的反应时间内成功进行。使用过的催化剂很容易分离并重复使用 6 次,而其催化活性没有明显损失。图形摘要
Preparation and characterization of Ca-modified Co/Al2O3 and its catalytic application in the one-pot synthesis of 4H-pyrans
作者:Sakineh Khaledi、Mahboobe Rajabi、Ahmad Reza Momeni、Heshmat Allah Samimi、Jalal Albadi
DOI:10.1007/s11164-020-04139-2
日期:2020.6
catalyst was increased. The catalyst was characterized by XRD, SEM, EDS, TEM and BET surface area analysis. The catalytic activity of Co/Ca–Al2O3 was investigated in the synthesis of 4H-pyrans. The Co/Ca–Al2O3 showed better catalytic activity than Al2O3 and Co/Al2O3. The catalyst can be recycled and reused without a significant structural change or considerable decrease in its activity. Graphic abstract
摘要 在这项研究中,通过共沉淀法合成了Co / Ca–Al 2 O 3复合材料作为非均相纳米催化剂。研究了添加Ca对结构性能和催化活性的影响。结果表明,Ca的加入影响了催化剂的比表面积和粒径,提高了Co / Al 2 O 3氧化物催化剂的催化活性。通过XRD,SEM,EDS,TEM和BET表面积分析对催化剂进行了表征。在合成4H-吡喃中研究了Co / Ca–Al 2 O 3的催化活性。Co / Ca–Al 2 O 3表现出比Al 2 O 3和Co / Al 2 O 3更好的催化活性。催化剂可以再循环和再利用,而不会发生明显的结构变化或活性显着降低。 图形摘要
Biocatalytic tandem multicomponent reactions for one-pot synthesis of 2-Amino-4H-Pyran library and in vitro biological evaluation
methodology offers a mild approach to obtain a library of 2-amino-4H-pyrans with good yields and favorable function group tolerance. Moreover, molecular docking experiments have been carried out to investigate the possible mechanism of this enzyme-initiated one-pot reaction. In addition, eight compounds in the library have been chosen in order to evaluate the in vitro antitumor activities against three
Mesoporous KIT-6 Supported Ionic Liquids as New and Highly Effective Heterogeneous Catalysts for Three-component Synthesis of 2-Amino-3-cyano-4H-pyrans
作者:Jing Rui Li、Chen Chen、Yu Lin Hu
DOI:10.5562/cca3797
日期:——
Ferric Sulfasalazine Sulfa Drug Complex Supported on Cobalt Ferrite Cellulose; Evaluation of Its Activity in MCRs
spectrometry. This green sulfasalazine drug complex supported on CoFe 2 O 4 cellulose was applied as an efficient and recyclable catalyst for organic reactions such as synthesis of functionalized 4H- pyrans and 1,4-dihydropyridines derivatives. All of the reactions were carried out successfully under mild conditions in a short reaction time. The usedcatalyst was easily separated and reused for 6 runs without
摘要 通过柳氮磺吡啶铁与作为磁性生物聚合物表面的纳米材料CoFe 2 O 4 -纤维素反应,制备了绿色纳米催化剂。这种新型非均相有机金属催化剂通过 X 射线衍射、场发射扫描电子显微镜、FT-IR 光谱、热重分析和 X 射线能量色散分析以及电感耦合等离子体质谱法进行了表征。这种负载在 CoFe 2 O 4 纤维素上的绿色柳氮磺吡啶药物复合物被用作有机反应的有效且可回收的催化剂,例如功能化 4H-吡喃和 1,4-二氢吡啶衍生物的合成。所有的反应都在温和的条件下在很短的反应时间内成功进行。使用过的催化剂很容易分离并重复使用 6 次,而其催化活性没有明显损失。图形摘要
Synthesis of (E)-diethyl 6,6′-(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates), a new type of 2,2′-azopyridine dyes
作者:Daniel Botelho da Silva、Abdelouahid Samadi、Lourdes Infantes、María do Carmo Carreiras、José Marco-Contelles
DOI:10.1016/j.tetlet.2010.09.095
日期:2010.12
An unexpected, but simple method for the efficient synthesis of new 2.2'-azopyridine dyes, such as (E)-diethyl 6,6'-(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates) (2, 4, 6, 8, 10, and 12), based on the treatment of ethyl 6-amino-5-cyano-2-methyl-4-arylnicotinates (1, 3, 5, 7, 9, and 11) with NBS/benzoyl peroxide, is described. The X-ray diffraction analysis and the UV-vis absorption spectra of dye 2 are reported and discussed. (C) 2010 Elsevier Ltd. All rights reserved.